Remember the days when the light fittings in most UK houses took a 60 Watt bulb with a bayonet cap (BC) fitting?

Well, those days are long gone.

Since the ‘90’s domestic light fittings and their respective bulbs have started appearing in an ever wider array of shapes, sizes, wattage's, fittings, technologies and voltages. Do you know your MR16 from your GU10? Would you recognise a G9 halogen capsule if you saw one? Is a 2.4W LED bulb a suitable replacement for a 50W halogen? Do you know the difference between an E14 and a SES fitting?